Componentize VariationsSeedStore and its unittest

components/variations/BUILD.gn

Index: components/variations/BUILD.gn
diff --git a/components/variations/BUILD.gn b/components/variations/BUILD.gn
index 53e0ecf42890b7232d99fdca5b4828462808ce06..651273fd13fac841e6cdb9e92ed5bb0a7c70b907 100644
--- a/components/variations/BUILD.gn
+++ b/components/variations/BUILD.gn
@@ -42,6 +42,8 @@ source_set("variations") {
     "variations_seed_processor.h",
     "variations_seed_simulator.cc",
     "variations_seed_simulator.h",
+    "variations_seed_store.cc",
+    "variations_seed_store.h",
     "variations_service_client.h",
     "variations_url_constants.cc",
     "variations_url_constants.h",
@@ -58,7 +60,10 @@ source_set("variations") {
     "proto",
     "//base",
     "//base:prefs",
+    "//components/compression",
+    "//crypto",
     "//third_party/mt19937ar",
+    "//third_party/protobuf:protobuf_lite",
   ]
 
   if (is_android) {
@@ -90,6 +95,7 @@ source_set("unit_tests") {
     "variations_request_scheduler_unittest.cc",
     "variations_seed_processor_unittest.cc",
     "variations_seed_simulator_unittest.cc",
+    "variations_seed_store_unittest.cc",
   ]
 
   if (is_android || is_ios) {
@@ -102,6 +108,7 @@ source_set("unit_tests") {
     "proto",
     "//base:prefs_test_support",
     "//base/test:test_support",
+    "//components/compression",
     "//testing/gtest",
   ]
 }